Sand ejector for flasks



w. E. BURGESS SAND EJECTOR' FOR FLAsKS Oct'. 9 1923.

Filed Novl '19 1921. 2 Sheets-Sheet 1 ,4 11v 'ENTOR Oct. 9, 1923; q 1,469,888

' .W, E. BURGESS SAND EJEQTOR FOR FLAsKs Fild Nov. 19. 1921 2 Sheets-Sheet 2 INVENTORI A Patented 09st. 9, 1923.

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- WALTER n. BURGESS, or nurnanronn, new nnsmz, .assisnoa To THE ENTRAL FOUNDRY COMPANY, or nEwYoa-K, n. Y., A conro aarron or Marian.

SAND EJEC'IOR FOB FLASKS. V

Application filed- November 19, 1921. Serial Iva 516,284.

To aZZ whom it may concern:-

Be it known that I, WALTER E. BURGESS, a' citizen of the United States, residing at Rutherford, Bergen County, New Jersey, have invented new and useful Improvements in Sand Ejectors for Flasks, of which the following is a specification, reference being'had to the accompanying drawings, in

' which particularly adapted to a continuous foundry, but may also be employed with single flasks. My invention also consists in the various features which I shall hereinafter describe and claim.

In the drawings, I have shown a continuous conveyor consisting of link belts 2 mounted on the sprockets 3 and driven from any suitable source of power. The flasks 4 have the usual projections 5 at their ends, which fit into recesses 6 in the links of the belts 2. The flasks 4: are shown in open po sition, that is, the cope and drag are illustrated as of similar construction and are arranged side by side, the castings having been removed therefrom so that the sand may be readily driven out of the flask.

The hake-out or sand ejector consists in a wheel 7 having arranged around its periphery plurality of sets of shoes 8 having their greatest dimension arranged on their peripheries. I have shown a plurality of shoes in each set, which are thus enabled to pass between the bars 9 across the top of a power.

flask i and lso require less pressure to force the sand out of a flask than if made in a solid piece, as the plurality of shoes assist in breaking up the sandrather than tending to force it out all in one mass whichwould require an application of much greater The wheel is arranged directly over the upper side of the conveyor and spaced a suflicient distance above it so that'as the wheel rotates the shoes will enter the successive molds, inasmuch as the sides of the shoes are arranged at angles re-entrant with their peripheral faces, which prevents interference between the shoes and the sides of the mold. Thewhee'l 7 may be driven'by i a sprocket chain, 10 suitably connected through sprockets and gearing and coun ter-shaft with the sliai'ting which drives the continuous belt 2. Beneath the poin-tof application of force of the wheel 7 and below the upper rim of the conveyor, are arranged supports 11, over which the conveyor travels and which act as an anvil and prevent the wheel from exerting abending movement on the conveyor. 1

In operation, after the cope halves of the flasks have been taken off and thearticles cast therein have been removed, the flasks :4,

one of which with the sand therein is shown at the left of Fig. 2, are then carried by the endless conveyor 2 directly-under the wheel 7. As the shoes 8 on the wheel are spaced about its periphery so as to properlyregister in the flasks 4 as these come alone. and

the wheel 7 is timed to move with the movement of the flasks,each set of shoes will enter a flask and will force the sand down and out of the flask. The bottom or peripheral face of the shoes 8, as it enters the flask at an angle, will serve to break up the sand before the full force of the shoe is exerted, and

as this force is exerted with a sort of fulcruming or turning movement, the sand will be effectively discharged from the flask.

In Figs. 3 and 4; I have shown a modified form of my invention, in which a shoe 8 is mounted on the end of a lever arm 12 which is oscillated about the axis 13. In this form the shoe 8 swings into the flask, as is shown in Fig. 3, forces the sand out'of the flask, and swings forwardly with the movement of the flask and then back to the full line poand at low'cost, since the operation is entirely automatic and the parts of the strips per are not only of'simple character but are 1 of very rugged construction.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no inten sition shown in F igQet, ready to swing down tion, in the use of such terms and expressions, of excluding any mechanlcal'equlvalents of the features shown and described, or portions thereof, but recognize that vari- Ions structural modifications are possible within the scope of the invention claimed.

What I claim is a 1.7111 mechanism for stripping sand operating in a horizontal plane 'beneath said wheel, a pluralityof flasks carried by said conveyor, and means for br nging sald shoes into register with successive flasks to expel the sand therefrom.

In mechanism for stripping sand from flasks, which consists in a rotary wheelhaving' a plurality 0t shoes arranged around the periphery thereof, said shoes having a broadfouter face and the sides thereof forn'iing re-entrant angles with said face, a plurality of flasks arranged in plane tangent to the periphery of the wheel, means for moving said flasks along Mid plane and into engagement with said shoes, and'means for bringing said shoes into-register with successive flasks and for expellingthe sand therefrom.

3,111 mechanism for stripping sand from rasasss flasks, which comprises a rotary *WllBEl having a plurality of shoes arranged around the perlphery thereof, a conveyor of said shoes, said shoes being brought successively into the interior of said molds to force the sand therefrom, and a support beneath the conveyor arranged to act as an WALTER E. UResssQ hich are mounted flasks movable in I 

